diff --git a/INSTALL b/INSTALL
index 623011a..ca1b97e 100644
--- a/INSTALL
+++ b/INSTALL
@@ -46,7 +46,7 @@ and installation:
     wide-character version of Curses, such as NcursesW, to work
     correctly.
 
-4.  The GNU Gettext library, version 0.20 or later, to allow the game to
+4.  The GNU Gettext library, version 0.21 or later, to allow the game to
     use languages other than English; this is also called Native Language
     Support.  If you do not have this library (and do not wish to install
     it), you may pass ``--disable-nls`` to the configure script.
@@ -335,7 +335,7 @@ will need the following additional tools installed on your system to do
 so:
 
 1.  `Autoconf`__ v2.71 or later
-2.  `Automake`__ v1.15 or later
+2.  `Automake`__ v1.16 or later
 3.  `pkgconf`__ v0.9.0 or later, or `pkg-config`__ v0.29 or later
 4.  `GNU Portability Library`__
 
diff --git a/NEWS b/NEWS
index 76684d5..4f99d91 100644
--- a/NEWS
+++ b/NEWS
@@ -25,7 +25,8 @@ __ https://www.zap.org.au/
 Version 7.19 (not yet released)
 -------------------------------
 
-Updated to the latest snapshot of the Gnulib GNU Portability Library.
+Updated to GNU Gettext 0.21 or later, to Automake 1.16 or later, and to
+the latest snapshot of the Gnulib GNU Portability Library.
 
 
 Version 7.18 (3rd August, 2022)
diff --git a/configure.ac b/configure.ac
index 470e41d..d5cc13e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@ AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/trader.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_HEADERS([config.h])
-AM_INIT_AUTOMAKE([1.15 -Wall -Werror foreign dist-xz])
+AM_INIT_AUTOMAKE([1.16 -Wall -Werror foreign dist-xz])
 AM_MAINTAINER_MODE([enable])
 AC_CONFIG_LIBOBJ_DIR([lib])
 
@@ -53,7 +53,7 @@ AC_TYPE_SIZE_T
 AC_TYPE_SSIZE_T
 
 AM_GNU_GETTEXT([external], [need-ngettext])
-AM_GNU_GETTEXT_VERSION([0.20])
+AM_GNU_GETTEXT_VERSION([0.21])
 
 gl_INIT